9678778769 has 8 divisors (see below), whose sum is σ = 10559864640. Its totient is φ = 8797892400.

The previous prime is 9678778757. The next prime is 9678778783.

9678778769 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-9678778769 is a prime.

It is a super-2 number, since 2×9678778769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9678778696 and 9678778705.

It is not an unprimeable number, because it can be changed into a prime (9678778729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62612 + ... + 152570.

It is an arithmetic number, because the mean of its divisors is an integer number (1319983080).

Almost surely, 2^9678778769 is an apocalyptic number.

It is an amenable number.

9678778769 is a deficient number, since it is larger than the sum of its proper divisors (881085871).

9678778769 is a wasteful number, since it uses less digits than its factorization.

9678778769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99751.

The product of its digits is 448084224, while the sum is 74.

The square root of 9678778769 is about 98380.7845516593. The cubic root of 9678778769 is about 2131.1148453504.

The spelling of 9678778769 in words is "nine billion, six hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred sixty-nine".